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Status report missing detection in a communication system

a communication system and status report technology, applied in the field of wireless communication systems, can solve problems such as significant challenges, data misses, and receives 40, and achieve the effect of improving transmission throughpu

Inactive Publication Date: 2005-03-24
INNOVATIVE SONIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020] It is an advantage of the claimed invention that the method improves transmission throughput.

Problems solved by technology

In the noisy environment of wireless transmissions, however, the receiver 40, be it a base station or a mobile unit, often misses data.
Thus, ensuring that the layer 2 SDUs 44 are presented in order can pose a significant challenge.
However, one of the main drawbacks of the prior art is that the estimated number of received AMD PDUs within a TTI is uncertain.
Moreover, in hybrid automatic-repeat-request (HARQ) procedures used in high-speed downlink packet access (HSDPA), the VR(EP) count down process is inappropriate since a PDU may be in fact retransmitted in a medium access control (MAC) layer.
Other disadvantages of the above-described system may also become apparent in certain applications.

Method used

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  • Status report missing detection in a communication system
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  • Status report missing detection in a communication system

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Embodiment Construction

[0028] In the following description, a communications protocol as disclosed in the 3GPP™ specification TS 25.322, V4.9.0, is used by way of example. However, it is noted that any wireless communications protocol that packs layer 3 data into layer 2 protocol data units (PDUS) may benefit from the disclosure contained herein. It is further noted that senders and receivers in the following detailed description can include cellular / mobile telephones, personal data assistants (PDAs), personal computers (PCs), base stations, networks, or any other device that utilizes a 3-layered wireless communications protocol.

[0029] Please refer to FIG. 5, which illustrates a schematic diagram of a method according to the present invention. In FIG. 5 advancing time is in the downward direction. A communications system 100 includes a sender 102 and a receiver 104, which can be devices such as the first and second stations 10, 20 of FIG. 1 communicating through a radio link.

[0030] As shown in FIG. 5, t...

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Abstract

A method to detect a lost status report determines that a second status report is required when an AMD PDU not negatively acknowledged in the first status report, an AMD PDU with a polling bit set, or the last negatively acknowledged AMD PDU is received after the expiry of a roundtrip timer and before all the negatively acknowledged AMD PDUs in the first status report are received. The method provides a deterministic way of detecting a lost status report, resulting in improved transmission throughput in a wireless communications system.

Description

CROSS REFERENCE To RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application No. 60 / 481,374, filed Sep. 14, 2003, entitled “STATUS REPORT MISSING DETECTION FOR ACKNOWLEDGED MODE” and included herein by reference.BACKGROUND OF INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to wireless communications systems, and more specifically, to methods for packet-based communication in such systems. [0004] 2. Description of the Prior Art [0005] The surge in public demand for wireless communication devices has placed pressure upon industry to develop increasingly sophisticated communications standards. The 3rd Generation Partnership Project (3GPP™) is an example of such a new communications protocol. Such standards may utilize a three-layer approach to communications. Please refer to FIG. FIG. 1 is a block diagram of three layers in such a communications protocol. In a typical wireless environment, a first station 10 is in wi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L1/12H04L1/16H04L1/18H04L29/10H04L12/02H04L12/26H04L29/06
CPCH04L1/1628H04L1/1685H04L2001/125H04L1/1848H04L1/1851H04L1/1809H04L12/02H04L69/32H04L9/40
Inventor JIANG, SAM SHIAW-SHIANG
Owner INNOVATIVE SONIC
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